ios - 如何快速将 "2017-07-11T06:52:15.948Z"转换为类似 "JUL, 7 2017"

Question

我正在尝试将字符串转换为日期，然后再次将日期转换为字符串。

我在下面尝试过，但它给了我一个零值错误

let string = "2017-07-11T06:52:15.948Z"

let dateFormatter = DateFormatter()
let tempLocale = dateFormatter.locale // save locale temporarily
dateFormatter.locale = Locale(identifier: "en_US_POSIX") // set locale to reliable US_POSIX
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let date = dateFormatter.date(from: string)!
dateFormatter.dateFormat = "dd-MM-yyyy HH:mm:ss"
dateFormatter.locale = tempLocale // reset the locale
let dateString = dateFormatter.string(from: date)
print("EXACT_DATE : \(dateString)")

然后我尝试通过像下面这样分隔确切的字符串来仅使用没有时间的日期

let string = "2017-07-11T06:52:15.948Z"
let dateonly = (string.components(separatedBy: "T"))[0]
let dateformatter = DateFormatter()
dateformatter.dateFormat = "yyyy-mm-dd"
dateformatter.locale = NSLocale(localeIdentifier: "en_US_POSIX") as Locale!
let date = dateformatter.date(from: dateonly!)

print(date ?? "no date ")


dateformatter.dateFormat = "MMM d, yyyy" //Your New Date format as per requirement change it own
let newDate = dateformatter.string(from: date!) //pass Date here
print(newDate)

这很好用。但是告诉我错误的月份

希望得到你的帮助

Answer 1

出于引用目的，我从 here 中获取了附加毫秒的答案 SSS

只是改变日期格式

dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"

到

dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"

完整代码

   let string = "2017-07-11T06:52:15.948Z"
    let dateFormatter = DateFormatter()
    let tempLocale = dateFormatter.locale // save locale temporarily
    dateFormatter.locale = Locale(identifier: "en_US_POSIX") // set locale to reliable US_POSIX
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
    let date = dateFormatter.date(from: string)!
    dateFormatter.dateFormat = "MMM d, yyyy" ; //"dd-MM-yyyy HH:mm:ss"
    dateFormatter.locale = tempLocale // reset the locale --> but no need here
    let dateString = dateFormatter.string(from: date)
    print("EXACT_DATE : \(dateString)")

输出